Bump version to v0.7.0 (#214)

Author: bnusunny

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "lambda_web_adapter"
-version = "0.6.4"
+version = "0.7.0"
 authors = [
     "Harold Sun <[email protected]>",
     "David Calavera <[email protected]>",
@@ -43,7 +43,7 @@ url = "2.3"
 httpmock = "0.6"
 http-body-util = "0.1.0-rc.2"
 http-body = "0.4.5"
-aws-sigv4 = "0.54"
+aws-sigv4 = "0.55"
 
 [[bin]]
 name = "lambda-adapter"